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Friday, January 11, 1957
e Carcasses qualifying for any par ticular grade may vary with respect to the relative development of the various characteristics that contribute to their conformation and quality, and there will be carcasses which qualify for a particu lar grade in which the development of some of these individual grade factors will be typical of other grades. Because it is impractical to describe the nearly limitless numbers o f such recognizable combinations of characteristics,, the standards for each grade describe only carcasses which have a relatively similar development of individual conformation and quality factors and which are also representative of the lower limit o f each grade. However, examples of the extent to which superiority in quality may com pensate for deficiencies in conformation, and vice versa, are indicated for each grade.

f The standards are intended to apply to all ovine carcasses without re gard to the apparent sex condition of the animal at time of slaughter. However, carcasses which have thick, heavy necks and shoulders typical of uncastrated males are discounted in grade in accord with the extent to which these character istics are developed. Such discounts may vary from less than half a grade in carcasses from young lambs in which such characteristics are barely notice able to as much as two full grades in carcasses from mature rams in which such characteristics are very pronounced. Although the grade standards for this full range of maturity are contained in three separate standards, it is the intent that.the three standards be considered as a continuous series. Therefore, in de termining the grade of a carcass which has a degree o f: maturity that is. not typical of that specified in one of the three standards it is necessary to inter polate between the standard for the kind of carcass lamb, yearling mutton, or mutton being graded and the standard for the kind o f carcass which is most closely adjacent to it in maturity.
53.116 Specifications for official United States standards fo r grades of lamb carcasses a Prime. 1 Car casses possessing minimum qualifications for the Prime grade tend to be compact and blocky and tend to have plump, full legs; wide, thick backs; thick, full,.
smooth shoulders; and short, thick necks.
Evidences of quality vary mark edly with changes in maturity. Carcasses from young lambs that have red, narrow hb bones; red, moist, porous break joints;
d a light pink color of inside flank niuscles have a moderate amount of feathering between the ribs, a modest quantity of fat streaking in the inside Jiank muscles, and a small amount of overflow fat over the inside of the ribs adjacent to the backbone. -The exterior nmsh is firm, and the flanks are full and firm.
t w parcasses from more mature lambs mat have slightly wide, slightly red rib
FEDERAL REGISTER

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c Good. 1 Carcasses possessing bones; slightly red but rather dry and hard breakpoints; and a dark pink color m in im u m qualifications for the Good of inside flank muscles have moderately grade are moderately rangy and slightly abundant and rather extensive feather angular with slightly thin, tapering legs;
ing between the ribs, slightly abundant slightly narrow, thin backs and shoul fa t streaking in the inside flank muscles, ders; and moderately long, thin necks.
2 Evidences of quality vary moder and a moderate amount o f overflow fat over the inside of the ribs adjacent to ately with changes in maturity. Car the backbone. The external finish is very casses from young lambs that have red, firm, and the flanks are very full and narrow rib bones; red, moist, porous break joints; and a dark pink color of firm.
4 To qualify for the Prime grade ainside flank muscles have traces of carcass must possess the minimum quali feathering between the ribs but prac fications for quality regardless o f the tically no fa t streaking in the inside extent that its conformation may exceed flank muscles and practically no overflow the minimum requirements for Prime. fa t over the inside of the ribs adjacent However, a development of quality which to the backbone. The exterior finish is is superior to that specified as minimum slightly firm, and the flanks are slightly for the Prime grade may compensate, on thin and soft.
3 Carcasses from more mature lambs an equal basis and without limit; for a development of conformation w hich ,is that have slightly wide, slightly red rib inferior to that specified for Prime as bones; slightly red but rather dry and indicated in the following example: A hard break joints; and a slightly dark carcass which has evidences of quality red color of inside flank muscles have a equivalent to the mid-point of the Prime slight amount o f feathering between the grade may have conformation equivalent ribs, traces of fa t streaking in the insid to the mid-point of the Choice grade and flank muscles, and traces of overflow fa t over the inside of the ribs adjacent to the remain eligible for Prime.
b Choice. 1 Carcasses possessingbackbone. The external finish is moder minimum qualifications for the Choice ately firm, and the flanks are slightly grade are slightly compact with slightly full and firm.
4 A carcass which has conformation plump, full legs; slightly wide, thick backs; slightly wide, full shoulders; and equivalent to at least th mid-point of the Good grade may have evidences of slightly short, thick necks.
2 Evidences of quality vary consider quality equivalent to the minimum for ably with changes in maturity. Car the upper third of the Utility grade and casses from young lambs that have red, remain eligible fo r Good. Also, a de narrow rib bones; red, moist, porous velopment of quality which is superior to break joints; and a slightly dark pink that specified as minimum for the Good color of inside flank muscles have a small grade may compensate, without limit, amount of feathering between the ribs, a fo r a development o f conformation slight quantity of fa t streaking in the which is inferior to that specified for inside flank muscles, and a slight amount Good on the basis of a half grade of o f overflow fat over the inside of the ribs superior quality for a third of a grade of adjacent to the backbone. The exterior deficient conformation as indicated in finish is moderately firm, and the flanks the following example: A carcass which has evidences of quality equivalent to the are slightly full and firm.
3 Carcasses from more mature lambs mid-point of the Good grade.may have that have slightly wide, slightly red rib conformation equivalent to the minimum bones; slightly red but rather dry and fo r the upper third of the Utility grade hard break joints; and a light red color and remain eligible fo r Good.
d Utility. 1 Carcasses possessing of inside flank muscles have a moderate amount of feathering between the ribs, minimum qualifications for the Utility a small quantity of fat streaking in the grade are very rangy and angular with inside flank muscles, and a small amount thin, slightly concave legs; very nar row, sunken backs; narrow, sharp o f overflow fa t over the inside of the shoulders; and long, thin necks. Hips ribs adjacent to the backbone. The ex and shoulder joints are plainly visible.
ternal finish is firm, and the flanks are 2 Although evidences of quality vary moderately full and firm.
slightly w ith changes in maturity the 4 A carcass which has conformation differences are so small as to make their equivalent to at least the mid-point of separate descriptions impractical. There the Choice grade may have evidences of is practically no feathering between the quality equivalent to the minimum for ribs, no fatjstreaking in the insid flank the upper third of the Good grade and muscles, and no overflow fa t over the remain pligible for Choice. Also, a de inside of the ribs adjacent to the back velopment of quality which is superior bone. The lean in the inside flank to that specified as minimum for the muscles and between the ribs is dark red Choice grade may compensate, on an in color. External finish is soft, and the equal basis and without limit, for a de flanks are soft and slightly watery.
3 A carcass which has conformation velopment of conformation which is in ferior to that specified for Choice as equivalent to at least the mid-point of indicated in the following example: A the Utility grade may have evidences of carcass which has evidences o f quality quality equivalent to the minimum for equivalent to the mid-point of the the upper third of the Cull grade and Choice grade may have conformation remain eligible for Utility. Also, a de equivalent to the mid-point o f the Good velopment of quality which is superior to grade and remain eligible for Choice.
that specified as minimum for the